The ACF321825-101-TD01 is an EMI Network Filter Signal Line EMI Filter manufactured by TDK. It is a surface-mount type filter featuring BBM (Bulk Current Injection) and EMI (Electromagnetic interference) protection for signal lines. It is equipped with high power line current capabilities, and a low insertion loss to provide a good signal integrity. The ACF321825-101-TD01 is ideal for use in signal lines in all types of electronic devices, particularly those that require superior EMI shielding, such as automotive and industrial networks. The filter is designed to provide electrical isolation between two parts of the circuit that are electrically non-isotropic with respect to each other. The ACF321825-101-TD01 is UL recognized, RoHS compliant, and lead-free.